Platen-mounted electric switch



W. S.-EDSAILL PLATEN MOUNTED ELECJTRIC SWITCH Aug. 2, 1932.

Filed Nov. 2a, 1924 Ine/e2? MKM S. M

Patentedi ug. 2, 1932 UNITED STATES PATENT OFFICE WILLIAM S. EDSALL, OFBOSTON, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS,

T0 CONDIT ELECTRICAL MANUFACTURING CORPORATION, OF BOSTON, MASSA-CHUSETTS, A CORPORATION OF MASSACHUSETTS MATEN-MOUNTED ELECTRIC SWITCHApplication filed November 28, 1924. Serial No. 752,730.

This invention relates to electric switches and has particular referenceto the so-called platen-mounted type of electric switch.

It is now common practice to mount oilimmersed electric switches onplatens or shelves in such a manner that the upper portion of the switchcasing rests upon the platen while the lo-wer portion, `or removable oilreceptacle, depends below the i platen and can be lowered and removedwithout disturbing the connections between the switch terminals and lineconductors. This arrangement is desirable, for one reason, in that thealignment between the switch termi nals and the fixed line terminals canbe accurately predetermined and preserved.

The platen is usually provided with a slot extended inwardly from theforward edge thereof, in which the switch is disposed; and the switchhas supporting members which projectl laterally beyond the boundariesand seat upon the platen. Y

In mounting the switch u on the platen the switch is usually elevatec,in a suitable manner, in front of the platen, to such a height that itssupporting members are slightly above the platen, and is then pushedrearwardly, in frictional engagement with the platform, to its properposition thereon. The switch usually is relatively heavy andconsequently the work of sliding the switch along the platform isconsiderable.

It is an object of this invention to provide a switch adapted for platenmounting with wheeled means adapted to bear upon the Y platen and bywhich the switch may be moved easily upon the platen into and from itsservice position thereon.

It is a further object of this invention to arrange said wheeled meansso that they may be removed from supporting engagement with the platenand permit the supporting members to rest directly upon the platen withthe switch terminals in connection with the line conductors. l

A platenmounted electric switch is or may be provided with means forconnecting and disconnecting it automatically with the fixed circuitterminals during the movement of the switch into and from serviceposition. Such elevated automatic disconnecting switches are more orless troublesome in that the contact pressure between thecurrent-carrying components of the switch is sometimes insufficient towithstand the magnetic forcestending to lseparate such components due toa heavy into contact with a substantial amount of pressure and,specifically, with a substantial proportion of the total weight of theoil switch.

A yet further object isthe provision of means whereby the act of raisingthe switch above the platen, to support the switch upon its wheeledstructure, automatically Vopens the disconnecting switch.

A yet further object is generally to improve the construction andoperation of electric switches and associated apparatus.

Fig. l is a side elevation of an electric switch and its platen mountingand illustrating the invention.

Fig. 2 is a rear elevation of the upper portion of the switch of Fig. l;

Fig. 3 is a detail of one of the supporting wheels disposed inswitch-supporting position.

Fig. 4 is a sectional detail of a Contact brush of the disconnectingswitch.

As here shown the platen-mounting for the switch includes a platen 10which is usually disposed in elevated position above the floor of theswitch room and may be contained in an enclosing cell, as shown. Saidplaten is formed with a slot l2 which is extended inwardly from theforward edge 14 thereof and the switch is adapted to be received in andto project both above and below the platen. The stationary elements ofthe disconnecting switches, one being shown -in Fig. l, are mounted onthe platen in the rear of said slot l2, and each may comprise aninsulator 15 fixed to the platen, and a Contact block 16 liXed to theupper end of the insulator and tor. Said contact block may be formedwith a recess 18 in its upper face which may contain an insulatingmedium, as oil, whereby to cover the contact faces of both said blockand the movable Contact member carried by the switch, and prevent,oxidation thereof.

The main ,electric Aswitch may include va casing comprising the switchframe 20 and the oil receptacle 22 which depends below the Vswitchframe.,E Theoil receptacle maybe yieldingly` connected with the `switch,frame and, to this end, may rest upon the carriagel 24. Rods 26 may beconnected with said carriage and extend upwardly about the loilreceptacle and pass freely through late rallyextended lugs 28 of theswitch frames. Heli-V cal springsf() mayloosely .surround the ,upvv

pergendsofsaid-rods, above said 4lugs, and nutsv ,32 mayt be adjustablyscrew-threaded on saldi nods and arrangedio bear upon the -up- Defiendeeifee-dep-rnge i The;v carriage `2 4 maybe provided withv wheels 34 bywhich the switch maybe trans-- Pertedf needil-yvebelit en theleerfeffthe switch.

room.r

=, Theswitcli islproyided vwith switch terminalsfwhiicli arelcarriedbythe switch frame andicxtencled, upwardly thereabove.

Theelectnic switc-ii-is adapted to be supported from the platen'byasupporting frame, which frame is also adapted to support the 1nembei-s.,38 which arefdisposedon opposite 1 Sidesfef, the fswteltzeasng,beneath the flugs 28, and are fixed to saidlugsby suitabley Ineens astheibelte 410,- .;ffSed baeeimembere are edepteelfterest the platen. enennesite sides, of thefslot 12 therein andto provdeysuppert,ferftlielsivteh.; Spe-eed 11prghtell are .seeured xte;theirear endsetsaid l base members and a cross-plate; 44 connects the uppereiidsofsa-idiiprights and prloyides support for insulating bushings 46. Saidbushir'igs-.V are disposed i approximately hori by the supporting trame.be lowered onto the platen by iirst releasing and brush members aredisposed for vertical alignment with the fixed contact members 16 of thedisconnecting switch and the brush members are adapted 'for detachableengagementwith said blocks in the manner illustratedin Fig. l.

Wheeled means are provided for supporting the switch upon the platen asit is moved therealongintoland.out of service positi0n.

Said meansl includes hand-operated levers 462 which are disposedadjacent the corners vof the supporting frame and are pivoted thereto bypins 64. i Rollers 66 are journalled on the lower vends of said levers.Then the switch isin the service position on the platen as illustratedin Fig. l, said levers and rollers vare movedY away froinsupportingrelation the sun aortine trame rests directl u on the L Y D platen.IVheinlhowever, the switch is to be.

Abetween the switch and platen, as shown,

withdrawnlfroni its normalposition, said c levers are adapted to beymoved. about their,

pivots,4 towardv the right, Fig. l, and finto: a.

position illustrated in Fig. 3, wherebyto raise.

the switch and its su 3 ortine frame above the platen and dispose therollersi 66 in contact with the platen and in switch-,supportingpolsition. Ilin this position the switchfmay -be readily, withdrawn andthe switch will roll,

,over the platen on said rollers.

Suitable means may be providednto hold-,1

the levers 62 releasably in switch-supporting relation.; Said means mayincludelatches .68, .Y

which latches may be pivotally connected -with said levers 62 above thepivots 6.4 and,A .if

arranged. to engageiwith fixed pins 70 carried said latches.

The switch .may i ,i

:platen by operating thelroller-levers 462 al soA f serves lto raise thecbrush membersI of. the

disconnecting switch away from engagement` Zontally line..with thefupper4endsLof the horizontally rearwandlytherefroi n A platey 52ieee-tendedbetweeuelid xedto. sedherzontal members 0 and ,bushings 5 4aresecured;v ,vertically in eedfplete Conducting with the fixedcontact-members 1 6 thence# `thereby openingithedisconnecting switch,Thedmiensions andrelation of the Avariousiio A parts of thedisconnecting:switch are adapten;

ed to besuch that, when l.the main switch is'in servicel position, rasubstantiaL portion of its weight is borne by the brush members ofthedisconnecting switch, thereby ensuringa firmI iis Contact at thedisconnecting switch, although. the arrangement is such that,preferably,-the

lmain switch is yet securely seated on ,the

platen.y f

Thestructuremay be otherwise modified f .withoutdeparting from thespiriot the inrodst 56 are V,extended through ,sa-id bushings g and; thelupper fende: thereef are fdetaeliabiy i 1* connected;electricallyAwithsaidi rods.; 4,8 at

their reel;-endeafleeke 158 are eerred'by the lowernendsY of saidv,f rods 5,6 and. one or more Persief div.ersenelerushx memberste maya,- becarried-@by eeeli bleek-ffrSed-.buehnge54 about on a floor, a.switch-supporting:frame:=

vention.

I claim: f

l. An electric switch including .afcasing.= hav-ing vsuppoitlng wheelson thebott om thereof by which the switch can.. be moved surroundingsaid casing intermediate; its end s,.

0^ ineaneeemieetms Seld frameandeasing, and it The act of raising theswitchabove-,the l frame-supporting rollers carried by said frame.

2. A truck-type electric switch including a casing having supportingwheels on the bottom thereof by which the switch can be moved about on afloor, means including rollers carried externally by said casingintermediate the ends thereof arranged to support the switch forhorizontal movement upon an elevated support.

3. An electric switch including a casing having supporting membersintermediate the ends thereof, switch supporting rollers, and means tomove said rollers into and out of position beneath said supportingmembers.

4. An electric switch including a casing having supporting membersintermediate the ends thereof, switch-supporting rollers, and means tomove said rollers into and out of position beneath said supportingmembers including levers pivoted to said casing and having supportingmeans for said rollers below said pivotal connections.

5. An electric switch including a casing having supporting membersintermediate the ends thereof, switch-supporting rollers, and means tomove said rollers into and out of position beneath said supportingmembers including levers pivoted to said casing and having supportingmeans for said rollers below said pivotal connections and means to holdsaid levers releasably in switch-supporting relation.

6. An electric switch including a casing having supporting membersintermediate the ends thereof, switch-supporting rollers, means to movesaid rollers into and out of position beneath said supporting membersincluding levers pivoted to said casing and having supporting means forsaid rollers below said pivotal connections and means to hold saidlevers releasably in switch-supporting relation including latchescarried by said levers, and cooperating locking-projections carried bysaid casing.

7. An electric switch including a casing having truck wheels at itslower end to support it for movement on a floor, a supporting frame forsaid casing disposed about and secured to said casing intermediate theends thereof, and rollers carried by said frame intermediate the ends ofsaid casing.

8. An electric switch including a casing, a

. supporting frame disposed about and secured to said casingintermediate the ends thereof, and rollers carried by said frame havingmeans to move them into and out of switchsupporting position below saidsupporting frame.

9. The combination of an electric switch including a casing, asupporting frame secured to said casing intermediate its ends, and anenclosing fixed support adapted to engage said frame and support thecasing, and means carried by the supporting frame arranged to elevatethe casing bodily above said support.

10. The combination of an electric switch including a casing, and afixed support adapted to engage and support the casing intermediate theends thereof, and means carried by the casing and having provision formovement into and out of effective engagement with said support arrangedto elevate the casing bodily above said support.

11. An electric switch including a casing, switch terminals carriedthereby, a supporting frame disposed about and carried by said casingintermediate the ends thereof, a disconnecting switch having its movablemember carried by said frame and connected electrically with one of saidswitch terminals, and rollers carried by said frame having means to movethem into and out of switch-supporting position beneath said frame.

12. The combination of a main switch, a disconnecting switch thereforhaving separable contact members that abut across the line of separationof said contact members, and means permitting the weight of said mainswitch to exert a pressure on said contact members, whereby to hold saiddisconnecting switch closed.

13. The combination of fixed line terminals, a circuit interrupterhaving supporting wheels on which the interrupter is movablehorizontally with respect to said line terminals and having means formoving said wheels toward and away from each other to move theinterrupter vertically above and relative to said wheels, and switchterminals carried by the interrupter movable vertically therewith by theoperation of the aforesaid means into and out of engagement with saidiixed line terminals.

14. The combination of fixed line terminals, a circuit interrupterhaving interrupter terminals adapted to cooperate with said fixed lineterminals, a support on which said interrupter is movable horizontally,said interrupter having supporting whe-els which roll upon said supportand provide for horizontal movements of the interrupter, and meanscarried by said interrupter to raise and lower it relative to saidsupport to effect engagement and disengagement of said interrupter andline terminals including means to move said wheels along said supportrelatively both to said support and to said interrupter.

In testimony whereof, I have signed my name to this specification.

WILLIAM S. EDSALL.

CERTFICATE OF CGRRECTION.

Patent No. 1,869,889. AugustZ, 1932.

WILLIAM S. EDSALL.

It is hereby certified that error appears in the printed specificationof the aboveA numbered patent requiring correction as follows: Page 3,line 62, claim 9, strike out the article "a" first occurrence and insertthe words an enclosing; and line 64, for "an enclosing" read a; and thatthe said Letters Patent should be read with these corrections thereinthat the same may conform to the record of the case in the PatentOffice.

Signed and sealed this 22nd day of November, A. D. 1932.

M. J. Moore, (Seal) Acting Commissioner of Patents.

CERTIFICATE 0F CGRREGTION'.

Patent No. 1,869,889. AugustZ, 1932.

WILLIAM S. EDSALL.

It is hereby certified that error appears in the printed specificationof the above. numbered patent requiring correction as follows: Page 3,line 62, claim 9, strike out the article "a" first occurrence and insertthe words an enclosing; and line 64, for "an enclosing" read a; and thatthe said Letters Patent should be read with these corrections thereinthat the same may conform to the record of the case in the PatentOffice.

Signed and seated this 22nd day of November, A. D. 1932.

M. J. Moore, (Seal) Acting Commissioner of Patents.

